212112110101 has 4 divisors (see below), whose sum is σ = 214797073600. Its totient is φ = 209427146604.

The previous prime is 212112110081. The next prime is 212112110137. The reversal of 212112110101 is 101011211212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212112110101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112110401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1342481631 + ... + 1342481788.

It is an arithmetic number, because the mean of its divisors is an integer number (53699268400).

Almost surely, 2^212112110101 is an apocalyptic number.

It is an amenable number.

212112110101 is a deficient number, since it is larger than the sum of its proper divisors (2684963499).

212112110101 is an equidigital number, since it uses as much as digits as its factorization.

212112110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684963498.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212112110101 its reverse (101011211212), we get a palindrome (313123321313).

It can be divided in two parts, 21211 and 2110101, that added together give a palindrome (2131312).

The spelling of 212112110101 in words is "two hundred twelve billion, one hundred twelve million, one hundred ten thousand, one hundred one".